Improvement in sash-balances



B. M. WHITING.` sAsH-BALANC'ES.

' Patented'Nov.14,1876,

'zgul.

Figi/- UNITED vSTATES PATENT OFFICE.

BARNET M. WHITING, OF LOS ANGELES, CAI.|IFOR].\TIA.

IMPROVEMENT IN SASH-BALANCES.

Specification forming part of Letters Patent No. 184,3l 2, dated November 14, 1876; application filed- September 28, 1876.

rangement for balancing, supporting, and

locking window-sashes; and consists in certain details of construction, as hereinafter more fully described and claimed, reference being had to the accompanying drawings, in

which- Figure lis awindow-sash with my device applied. Fig. 2 is an end view of my device. Fig. 3 is a section of the same. Fig. 4 iswa horizontal section.

Let A represent a window-frame. B is the lower and Gis the upper window-sash. On one side of the frame A, opposite the point where the upper rail of the lower sash and the lower rail of the upper sash come together when the sashes are in their proper positions, I make a hole in the casing of the windowframe, and over this hole I secure a plate, D, to which the main part of the operating mechanism is attached, so that the mechanism will be inside ot' the casing and out of sight. This plate D has a bracket or standard, F, projecting from its middle into the hollow casing, and a short arm or fixed journal, G, is secured to the extremity of this arm on each side, and at right angles to the standard. On each of these short arms or journals I mount a small hollow wheel or drum, H, so that it will revolve freely, and inside ot' each drum I place a coiled spring, one end of which is attached to the journal, while its opposite end is attached to the rim ot' the drum. Teeth or projections I I are formed on the rim of each wheel or drum, and the plate D is slotted opposite the teeth, so that they will project through, as represented. On the edge of each sash I secure a metal plate, J, in which I make notches or recesses K K at short distances apart, corresponding with the cogs of the Wheels H, so that they will form racks, with ject through a hole in the plate and enter the p notches -of the rack-plate J as they come opposite it. Each of the pawls is operated by a lever, M, which-projects through the casing in front of the sashes, and the end of which is formed into a button or head, N, so that by pressing inward on the button the dog or pawl will be lifted free from the notches in the rackplate, and thus allow the sashes to move up or down. These dogs or pawls fasten the window at any desired point, one of them being arranged opposite the upper and the other opposite the lower sash. O is a pivoted lever,

which has two arms, P P. This lever is pivoted to the plate D below the wheels or drums H, so that its arms are directly below the cogs of the drums. The end of this lever projects through a curved slot in the casing in front of the lower sash, so that by pressing downward upon the projecting end the opposite end will be raised, so as to interlock the ends ot' the arms P P with the cogs of the drums, and thus prevent the drums from rotating. This operation permanently locks the sash at whatever position it stands when the lever-arms are moved to interlock with the cogs.

I thus combine a sash-balance, sash-fastener, and sash-lock in a simple device, which can be readily operated and cheaply applied. The entire device, except the buttons and the end of thelocking-lever, is concealed inside of the casing, so that it will present a neat appearance. The sashes can be removed in theordinary way without trouble and replaced again when desired.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

l. In combination with the spring drums or Wheels H, with their cogs or teeth I arranged to engage with the rack-plate J on the edge of the sash-frame, the dog or pawl L, operated by the lever M, substantially as and for the purpose described.

2. The pivoted locking-lever O passing behind the pins I, with its arms P P, in combina-v tion with the spring drums or Wheels H, having teeth or cogs I I, which engage with the notches in the rack-plate on the Window-sash,

substantially as and for the purpose described.

BARNET MATTHIAS WRITING. [1.. s.]

Witnesses:

RoB'r. S. MOORE, O. F. HARPER. 

